EP1448852A1 - Composition de traitement de surface, procede dans la fabrication de papier ou de carton, papier ou carton et utilisation d'une composition de traitement de surface - Google Patents

Composition de traitement de surface, procede dans la fabrication de papier ou de carton, papier ou carton et utilisation d'une composition de traitement de surface

Info

Publication number
EP1448852A1
EP1448852A1 EP02749498A EP02749498A EP1448852A1 EP 1448852 A1 EP1448852 A1 EP 1448852A1 EP 02749498 A EP02749498 A EP 02749498A EP 02749498 A EP02749498 A EP 02749498A EP 1448852 A1 EP1448852 A1 EP 1448852A1
Authority
EP
European Patent Office
Prior art keywords
starch
paper
surface treating
ofthe
treating composition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02749498A
Other languages
German (de)
English (en)
Inventor
Philip Hakansson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stora Enso AB
Original Assignee
Stora Enso AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stora Enso AB filed Critical Stora Enso AB
Publication of EP1448852A1 publication Critical patent/EP1448852A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/54—Starch
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
    • C08L3/04—Starch derivatives, e.g. crosslinked derivatives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D103/00—Coating compositions based on starch, amylose or amylopectin or on their derivatives or degradation products
    • C09D103/04—Starch derivatives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J103/00—Adhesives based on starch, amylose or amylopectin or on their derivatives or degradation products
    • C09J103/04—Starch derivatives
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/42—Coatings with pigments characterised by the pigments at least partly organic
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
    • D21H21/52—Additives of definite length or shape

Definitions

  • the invention relates to a new composition comprising starch, which is useful for surface treatment in connection with the manufacturing of paper and paperboard.
  • the invention also relates to a method in the manufacturing of paper and paperboard with use of this composition and to paper or paperboard that comprises a composition according to the invention.
  • the invention relates to the use of a surface treating composition.
  • the predominant part of all paper and paperboard that is produced to be used in copying machines, laser printers, ink jet printers and in different printing methods such as offset printing and flexoprinting e.g., is surface treated in the papermaking machine by the surface being coated by some sort of composition.
  • This composition may be composed in the main part of starch in a dissolved form, in which case the surface treatment usually is called a surface sizing. If the composition contains some sort of pigment, in the form of solid particles, the surface treating is called pigmenting and the composition is called a coating paste.
  • the objectives of this surface treating are several.
  • Surface coating with compositions consisting in the main of starch solutions prevents the paper from dusting in printing, copying and optional post treatment e.g.
  • some type of synthetic polymer is added to the surface sizing solution in order to improve printing quality when using an ink jet printer.
  • compositions containing pigments, coating pastes are most often used to improve the printability of he paper. Moreover, many paper properties are improved. Above all, improved printability properties are attained by improvement ofthe surface smoothness. The printing ink absorption increases and becomes more even and the representation of images is improved. To these advantages may be added that the paper exhibits an improved "feeling".
  • a conventional coating paste usually contains an inorganic pigment that most often consists of calcium carbonate and/or clay.
  • Other pigments exist too, such as e.g. silicon dioxide and in rare occasions, organic pigments such as plastic pigments.
  • the paste also contains a binding agent that can consist of dissolved starch and/or a synthetic binding agent. Examples of common synthetic binding agents are styrene butadiene latex and acrylate latex.
  • starch solution or coating paste may take place in different ways.
  • One common method is to apply the starch solution or coating paste, by aid of grooved rods, onto two rolls that form a nip through which the paper web passes.
  • the starch or paste applied onto the rolls is in that way transferred to the paper web, in the nip.
  • Another method is to transfer the starch or paste from a roll or in direct contact with a fountain, to the paper web in order in the next step to level out the film formed on the paper web, by aid of a blade.
  • this surface application method which is called a blade coating
  • one side ofthe paper is usually treated first, where after that side is dried before the next side is treated in the same way.
  • the paper web passes one or more roll nips in the so called calendering machine, in order for the surface coarseness to diminish.
  • the surface coarseness is measured in the unit "ml/min Bendtsen", and the lower the value, the greater the surface smoothness ofthe paper.
  • the surface coarseness decreases with an increased line pressure, which is positive for the printability properties e.g., ofthe paper.
  • the bulk however also decreases with an enhanced line pressure, which on the contrary is not desirable.
  • the paper or paperboard Another important property ofthe paper or paperboard is its opacity, which constitutes a measure ofthe lack of transparency ofthe paper.
  • the basis weight ofthe paper (the weight in gram of 1 m 2 paper) may be decreased with large economical savings as a result.
  • An increased opacity for a copying paper or a paper intended for offset printing also allows for improved use of both sides ofthe paper for printing or copying, without the print on the one side being disturbed by the print on the opposite side. For a paper intended for envelopes e.g., the importance of having a good opacity is great.
  • Another important optical property is the whiteness ofthe paper or paperboard.
  • a high whiteness is achieved by choice of raw material having a high brightness, and by aid of optical whiteners.
  • An efficient use of an optical whitener demands that it functions together with the surface treating composition.
  • carriers has been introduced, meaning that one ofthe components in the surface treating composition has to be a good carrier for an optical whitener, in order for the whiteness to develop efficiently.
  • the thickness ofthe paper has a value in it self, giving e.g. a thicker printed paper that gives an expensive impression.
  • the stiffness ofthe paper increases with the thickness (the stiffness is a function ofthe E-modulus times the thickness in cubic).
  • An increased thickness (decreased density) ofthe paper may also be used in order to decrease the basis weight. Paper makers most often use the concept of "bulk", which is the inverted value ofthe density. Accordingly, a bulk that is as high as possible is aimed for.
  • Another important property is the air permeability ofthe paper.
  • a relatively low value is aimed for, i.e. a high air resistance, in order to among other things avoid double feeding in suction fed printing presses and through-printing in connection with flexoprinting.
  • a high air resistance is also necessary in the use of machines for automatic insertion in envelopes.
  • an air resistance that is too low causes double feeding and problems in opening the flap ofthe envelope.
  • PCC Precipitated Calcium Carbonate
  • a paper with good printability properties for ink jet printers is in the main characterised by the following:
  • a minimal through-print This is not achieved if a penetration ofthe ink pigment or colouring agent into the paper is too strong, causing the colour to be seen on the back side ofthe paper.
  • a high through-print often results in a low optical density. The through-print is measured visually or with an optical densitometer.
  • a surface sized paper has good physical properties such as a low density and a high stiffness that result in good runnability in printing presses, copying machines, printers and converting machines, such as envelope manufacturing machines, but exhibits an impaired printing quality in the use of ink jet printers and different printing presses.
  • a pigmented or coated paper gives a considerably improved printing quality, but has a bad stiffness due to its low thickness and it is most often perceived as "limp".
  • expensive special pigments have however hitherto been required in the paper manufacturing.
  • cross-linked starch in connection with paper manufacturing, the cross-linked starch however not being used in surface treating compositions. Examples of such patents are US 4,810,785; US 5,122,231; US 5,368,690; US 5,523,339.
  • non gelatinised starch grains in a coating composition for matt paper in an amount of from 10 to 65 percent by weight, based on the solids content.
  • the remaining part ofthe solid particle content is calcium carbonate.
  • SE 421 638 shows a wallpaper that can be embossed and printed, and that can have paper or paperboard as a base material.
  • the wallpaper is coated with a coating agent that consists of non gelatinised starch in an amount of 10 - 100 % by weight.
  • the objective ofthe invention is to offer a surface treating composition, by aid of which the problems mentioned above are eliminated or limited and/or great economical profits are attained.
  • the invention may beneficially be used for papers of different types, such as paper for ink jet printers, envelope paper, copying paper, paper for laser printers or other types of paper or paperboard.
  • Another objective ofthe invention is to offer a new surface treating composition that gives improved printability properties to the paper in the use of ink jet printers and printing presses, in a manner that is considerably more cost efficient than for known compositions.
  • Another objective ofthe invention is to offer a new and improved surface treating composition that gives a higher bulk to the paper.
  • Another objective ofthe invention is to offer a new and improved surface treating composition that gives a higher air resistance to the paper.
  • Another objective ofthe invention is to offer a new and improved surface treating composition that gives a higher opacity to the paper.
  • Another objective ofthe invention is to offer a new and improved surface treating composition that gives a higher brightness and/or that can reduce the requirement of optical whiteners.
  • Another objective is to offer an improved method of producing paper.
  • Another objective ofthe invention is to offer paper with improved properties.
  • a surface treating composition that comprises at least one cross-linked starch which not at all or only partly has been dissolved and which thereby also exists in the form of solid starch particles (pigment), in an amount of more than 65 % at room temperature and counted on the content of solid substance in the composition. At least 10 % ofthe starch content ofthe composition exists moreover as solid particles in the entire temperature range of 20 - 50 °C. The latter feature contributes to the effect ofthe invention since the pigment, already at the manufacturing, is exposed to an increased temperature.
  • the composition is moreover heated before and in connection with the applying on the paper or paperboard web, temperatures of up to about 50 °C being common. Finally, the composition is heated as it dries on the paper or paperboard web in the paper or paperboard machine.
  • the content of starch particles is more than 70 %, preferably more than 75 % and even more preferred at least 80 % at room tempera- rure and counted on the content of solids in the composition. It is preferred that the just given ranges for the content of starch particles in the composition are valid at 50 °C too.
  • Cross-linked starch is obtained by reaction with bi- or polyfunctional reagents. They react with several hydroxyl groups in the starch and result thereby in the building of bridges between the starch molecules. At an increased degree of cross-linking, the starch grain becomes more and more resistant to gelatinising.
  • the cross-linked starch that is used in this invention may include starch that is treated with one or more ofthe compounds described in "Starch Derivates; Production and Uses” by Morton W. Rutenberg and D. Solarek and "Starch; Chemistry and Technology", Chapter X, pp. 324 - 332, 1984, and the patents referred to above.
  • Such cross-linking compounds may consist of methylamine compounds, polyvalent acids, polyvalent acid esters, polyvalent acid halides, polyvalent acid anhydrides, polyaldehydes, polyepoxides, polyisocyanates, divinyl compounds, phosphoryl chloride, polyamine polyepoxide resin, 1,4-butane diolglycidyl ether, epichlorohydrin, trimetaphosphates, mixtures of anhydrides of acetic acid and two and three protonic acids, sodium hypochlorite, phosphor oxy trichloride.
  • the starch dissolves if a starch slurry is heated. At an increased degree of cross-linking, the disposition ofthe starch to go into dissolved form, decreases.
  • the starch used in the invention may have very different degrees of cross-linking. From a relatively low degree of cross-linking, in which about 10 % ofthe starch exist as solid particles at a temperature of about 20 to 50 °C, and the rest ofthe starch constitutes a binder in dissolved form, to a high degree of cross-linking, where about 100 % ofthe starch exist as solid particles in the temperature interval given above.
  • At least 15 %, preferably at least 20 % ofthe starch content of the composition at about 20 to 50 °C is constituted by starch particles according to the invention. It should be noted that what has just been stated is not contradictory to the limitation that more than 65 % ofthe solids content should be starch particles, given that the solid pigments ofthe composition are essentially only composed of these starch particles or only at very small amounts comprise other types of pigments. Independent ofthe cross-linking degree, the composition may also contain other types of soluble starch or some synthetic polymer, in order to obtain an adequate amount of binder and further improved printability properties.
  • the starch should be additionally modified.
  • the starch may be modified to act as cation active, anion active, amphoteric or hydrophobic.
  • cation active starches In the production of cation active starches, the starch is substituted by cation active groups, ammonium compounds most often being used, that preferably are quaternary, but that also may be primary or tertiary.
  • cation active groups ammonium compounds most often being used, that preferably are quaternary, but that also may be primary or tertiary.
  • Such a cationising process for starch is well known and is described among other places in US 4,088,600; US 2,876,217 and US
  • anion active starches the starch is substituted with anion active groups that most often consist of carboxylic, carboxylate, sulphonic, phosphonic or phosphate groups.
  • anion active groups that most often consist of carboxylic, carboxylate, sulphonic, phosphonic or phosphate groups.
  • Such methods are well described in the literature, among other places in the references mentioned above, by Morton W. Rutenberg and D. Solarek, and STARCH: Chemistry and Technology by Roy L. Whistler, James N. Bemiller and Eugene F. Pachall, respectively.
  • amphoteric starch the starch is substituted both by cation active and anion active groups.
  • the starch exhibits a degree of substitution of 0.01 - 0.30 and even more preferred 0.02 - 0.20. Uncharged starch too may however work according to the invention.
  • hydrophobic starches In the manufacturing of hydrophobic starches, several reagents may be used, whereof benzyl chloride, styrene oxide, phenyl isocyanate and butyl glycidyl ether may be mentioned.
  • cationic hydrophobic groups are incorporated in the starch molecule.
  • the surface treating composition may also comprise a minor amount of other pigments in the form of solid particles.
  • pigments may e.g. be constituted by calcium carbonate, clay, silicon dioxide and/or aluminium oxide.
  • the solid content ofthe composition is essentially only constituted by the inventive starch particles.
  • the printability properties of the paper are improved when ink j et printers are used, whereby the running of ink decreases, the optical density increases, the print- through decreases and the bleeding decreases or is eliminated.
  • the print- ability properties ofthe paper are improved when printing presses based on offset or flexoprinting technique are used. In colour copying, the image quality is e.g. improved. Double feeding in suction fed printing presses is avoided and envelopes manufactured from paper that has been surface treated with said compositions work excellent in automatic document insertion machines.
  • the positive, surprising effects ofthe invention depend on that the particles ofthe surface treating composition are amorphous and that they thereby have a much larger specific surface than conventional pigments.
  • the high specific surface of the filler composition is probably also the reason for the improved printing properties of the paper when ink jet printers are used as the absorption of ink into the paper is improved due to an increased number capillaries having a smaller radius. This large surface also advantageously absorbs printing ink in offset printing.
  • the starch particles even if being non gelatinised, exhibit an advantageously sticky surface.
  • the denser surface may be the explanation for the improved printing result as the flexo-ink remains in the surface ofthe paper.
  • the large surface ofthe starch pigments at the same time prevents slow drying by its good absorption ability.
  • the plastic character ofthe particles makes them more easily calendered, whereby only a relatively low line pressure has to be used in the calendering machine in order to obtain the desired surface smoothness.
  • This low line pressure may, together with the, as compared to calcium carbonate and clay, significantly lower density ofthe starch particles, explain the high bulk that is obtained compared to conventionally surface sized or coated paper.
  • the lack of transparency ofthe starch particles also increases the opacity ofthe paper as compared tb the effect ofthe transparent starch solution that is used in surface sizing.
  • EXAMPLE A non surface treated paper having a basis weight of 80 g/m 2 was coated in a pilot test with a composition consisting only of cross-linked starch in water, at room temperature.
  • the starch was delivered by Emsland-Starke Gmbh and had the trade name F 6270.
  • the starch was cationic, with a nitrogen content of 0.35 %.
  • the average particle size had been brought down to about 10 ⁇ m by mechanical treatment. Ofthe starch, about 15 % was dissolved and accordingly, about 85 % ofthe starch existed as solid particles.
  • the coating was calculated to 1.5 gram per square meter and side.
  • the applying on the paper surface took place by aid of a SymSizer from Metso Oy. This paper was called A.
  • optical density was measured in printing with an ink jet printer ofthe type Hewlett Packard 950 C and the ink bleeding was measured in printing with an ink jet printer of the type Epson 980 C. These printers are very common and constitute excellent tools for evaluating the printing quality of different papers.
  • the optical densities measured are shown in Table 2.
  • paper A In the visual evaluation of print-through, paper A exhibited significantly less penetration into the paper as compared to paper B. Both papers exhibited a minimal running of ink.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

La présente invention concerne une composition de traitement de surface, sous la forme d'une composition aqueuse. Selon l'invention, la composition comporte, a la température ambiante et mesurée sur la teneur en solides de la composition, des particules d'amidon en une quantité supérieure à 65%, l'amidon des particules d'amidon étant constitué par un amidon réticulé et au moins 10% de la teneur en amidon de la composition étant composé par des particules d'amidon dans la plage de température de 20 à 50°C. L'invention a trait également à un procédé dans la fabrication de papier et de carton mettant en oeuvre ladite composition et un papier ou un carton comprenant une composition selon l'invention. Enfin, l'invention a trait à l'utilisation d'une composition de traitement de surface.
EP02749498A 2001-09-06 2002-07-29 Composition de traitement de surface, procede dans la fabrication de papier ou de carton, papier ou carton et utilisation d'une composition de traitement de surface Withdrawn EP1448852A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0102988A SE524281C2 (sv) 2001-09-06 2001-09-06 Ytbehandlingskomposition, innefattande stärkelsepartiklar, metod vid framställning av papper eller kartong, papper eller kartong samt användning av en ytbehandlingskomposition
SE0102988 2001-09-06
PCT/SE2002/001416 WO2003021039A1 (fr) 2001-09-06 2002-07-29 Composition de traitement de surface, procede dans la fabrication de papier ou de carton, papier ou carton et utilisation d'une composition de traitement de surface

Publications (1)

Publication Number Publication Date
EP1448852A1 true EP1448852A1 (fr) 2004-08-25

Family

ID=20285268

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02749498A Withdrawn EP1448852A1 (fr) 2001-09-06 2002-07-29 Composition de traitement de surface, procede dans la fabrication de papier ou de carton, papier ou carton et utilisation d'une composition de traitement de surface

Country Status (3)

Country Link
EP (1) EP1448852A1 (fr)
SE (1) SE524281C2 (fr)
WO (1) WO2003021039A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2923974A1 (fr) * 2013-09-10 2015-03-19 Innogel Ag Materiau d'emballage dote d'un revetement barriere a base d'amidon, ainsi que composition d'enduction, procede et dispositif servant a fabriquer un tel revetement barriere
US9840811B2 (en) * 2013-09-18 2017-12-12 Innogel Ag Packaging material comprising a starch-based barrier coating and coating composition and process for producing the same
FR3029928B1 (fr) * 2014-12-15 2018-03-09 Teoxane Gel reticule
EP3296666A1 (fr) * 2016-09-14 2018-03-21 Siemens Aktiengesellschaft Préparation d'amidon pour l'hydrophobisation de papier

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI59442C (fi) * 1975-01-17 1984-06-27 Feldmuehle Ag Anvaendning av ett strykmassaskikt foer tillverkning av en praeglings- tryck- och tvaettbar raotapet
US5314753A (en) * 1988-12-07 1994-05-24 Stora Feldmuhle Aktiengesellschaft Printing paper and a process for its manufacture
DE4207690C1 (fr) * 1992-03-11 1993-09-09 Zanders Feinpapiere Ag, 51465 Bergisch Gladbach, De
DE4213746C2 (de) * 1992-04-25 1996-03-07 Feldmuehle Ag Stora Druckträger mit einem ein- oder beidseitigen Strich
US5368690A (en) * 1992-12-23 1994-11-29 National Starch And Chemical Investment Holding Corporation Method of papermaking using crosslinked cationic/amphoteric starches
FI108061B (fi) * 1995-10-05 2001-11-15 Metso Paper Inc Menetelmä liikkuvan paperi- tai kartonkirainan päällystämiseksi
FI98943C (fi) * 1996-01-10 1997-09-10 Raisio Chem Oy Menetelmä paperin tai kartongin ominaisuuksien parantamiseksi

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03021039A1 *

Also Published As

Publication number Publication date
SE524281C2 (sv) 2004-07-20
SE0102988D0 (sv) 2001-09-06
WO2003021039A1 (fr) 2003-03-13
SE0102988L (sv) 2003-03-07

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